I implemented code to block the SC_ANALYTICS_GLOBAL_COOKIE
cookie if the consent has not been given (based on this blog post). But after doing that, I noticed, that none of the form's submit actions work (at first I noticed the "Show Page Form" from Sitecore Form Extensions
did not work, but tried with "Send Email", and it did not work anymore as well). It is mentioned in the blog post, that disabling that cookie will disable any features that use XConnect, although I am not sure if Submit Actions are part of XConnect. It feels like aborting the "startAnalytics" pipeline is blocking the submit actions, but I am not sure if that's how it's supposed to be working or could be there another issue.
I did not see anything in the logs. Working on Sitecore 10.1.2